#login {
    width: 100vw;
    height: 100vh;
    background: url('../img/1.jpg') no-repeat;
    background-size: 100% 100%;
    .form {
        width: 600px;
        height: 200px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        
    }
}